The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given. Concept introduction: Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction. There are mainly three types of pericyclic reactions, 1) Electrocyclic reactions 2) Cycloaddition reactions 3) Sigmatropic reactions In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.” Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

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Answer 1

Question

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

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Answer 2

Question

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

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Answer 3

Question

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

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Answer 4

Question

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

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Answer 5

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 6

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 7

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 8

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 9

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 28.1 - Prob. 1P Ch. 28.2 - Prob. 2P Ch. 28.2 - Prob. 3P Ch. 28.2 - Give a molecular orbital description for each of...Ch. 28.3 - Prob. 5P Ch. 28.3 - Prob. 6P Ch. 28.3 - Prob. 7P Ch. 28.3 - Prob. 8P Ch. 28.4 - Prob. 10P Ch. 28.4 - Prob. 11P

Solution Summary: The author explains the sigmatropic rearrangement that occurs in each of the given reactions.

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Chapter 28 Solutions